A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6685-01-596-1480
NSN 5930-01-398-0083
NSN 5855-00-688-9954
NSN 5965-01-172-5724
NSN 5975-01-217-8545
NSN 5998-00-088-3728
NSN 5996-01-583-4233
NSN 6650-01-472-8804
NSN 6650-00-185-8344
NSN 6105-01-043-2565
NSN 5925-01-253-2765
NSN 6610-01-175-9045